feat(tasks): add support for Google Tasks

[allenhutchison]

Adds full support for Google Tasks.

• Implements TasksService to interact with the Google Tasks API.
• Registers new tools:
  • tasks.listLists: List task lists.
  • tasks.list: List tasks in a list (supports filtering and assigned tasks).
  • tasks.create: Create new tasks.
  • tasks.update: Update existing tasks.
  • tasks.complete: Mark tasks as completed.
  • tasks.delete: Delete tasks.
• Updates AuthManager to include tasks scope.
• Adds comprehensive tests.

Fixes #105

[gemini-code-assist]

Summary of Changes

Hello @allenhutchison, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly expands the system's capabilities by integrating full support for Google Tasks. It introduces a dedicated service and a comprehensive set of tools that enable users to programmatically manage their task lists and individual tasks, from creation and listing to updating and deletion. This enhancement allows for more robust task management workflows within the existing framework.

Highlights

• Google Tasks Integration: Introduces full support for Google Tasks, allowing interaction with the Google Tasks API to manage task lists and individual tasks.
• New Tools Registered: A comprehensive suite of new tools has been registered, including 'tasks.listLists', 'tasks.list', 'tasks.create', 'tasks.update', 'tasks.complete', and 'tasks.delete', enabling various task management operations.
• Authentication Scope Update: The 'AuthManager' has been updated to include the necessary 'https://www.googleapis.com/auth/tasks' scope, ensuring proper authentication for Google Tasks API access.
• Comprehensive Testing: Extensive unit tests have been added for the new 'TasksService' to validate the functionality and reliability of all Google Tasks operations.
• Documentation Update: A new section has been added to 'WORKSPACE-Context.md' providing guidelines and best practices for effectively utilizing the new Google Tasks tools.

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[gemini-code-assist]

Code Review

This pull request adds comprehensive support for Google Tasks, including a new TasksService, corresponding API client logic in AuthManager, and registration of several new tools. The implementation is well-structured and includes a good set of tests. My review includes a few suggestions to improve test coverage and enhance consistency and conciseness in the service implementation.

[gemini-code-assist]

The test for completeTask verifies that the patch method is called with the correct arguments, but it doesn't check the return value of completeTask. For consistency with other tests in this file (like updateTask), you should also assert that the returned result is correct.

        const result = await tasksService.completeTask({ taskListId: 'list1', taskId: 'task1' });

        expect(mockTasksClient.tasks.patch).toHaveBeenCalledWith({
            tasklist: 'list1',
            task: 'task1',
            requestBody: {
                status: 'completed',
            }
        });
        expect(result).toEqual({
            content: [{ type: 'text', text: JSON.stringify(mockResponse.data, null, 2) }],
        });